Entering the second week of May, John Lackey was one of the main culprits of the Cubs' starting rotation struggles.
The veteran starter with a career 3.88 ERA went 11-8 with a 3.35 ERA in 2016, yet entered Tuesday's start in Colorado with a 5.14 mark this season.
Nobody figures a date with the best hitter's park in the league would've helped matters, but Lackey responded with one of the best starts in Coors Field history.
The 38-year-old struck out 10 in seven shutout innings, only the second such start in the field's history by a visiting player, joining the legendary Pedro Martinez.
Martinez accomplished the feat in 1997, the year he won his first Cy Young Award and posted a 1.90 ERA and 13 complete games with the Montreal Expos.
Lackey is now 3-3 on the season with a 4.29 ERA and 1.31 WHIP.